Ravichandran KD, Osman S, Kurniati D. Enhancing Problem-Solving Learning Through Abacus Mental Arithmetic: A Cognitive Science Perspective on Primary School Students . IJARPED [Internet]. 2024 Jan. 1 [cited 2025 Aug. 2];13(1). Available from: https://ijarped.com/index.php/journal/article/view/556